<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="/js/echarts.all.js"></script>
    <script src="/js/dataTool.js"></script>
    <script src="/js/jquery.js"></script>
</head>
<body>
<div id="mai1n" style="width: 600px;height:400px;position:absolute;top:50%;left: 50%;margin-top: -200px;margin-left: -300px;"></div>

</body>
</html>